1. Updated function headers in all assembly files.

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / LShiftU64.asm

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2006, Intel Corporation\r
; All rights reserved. This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution.  The full text of the license may be found at\r
; http://opensource.org/licenses/bsd-license.php\r
;\r
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
;\r
; Module Name:\r
;\r
;   LShiftU64.asm\r
;\r
; Abstract:\r
;\r
;   64-bit left shift function for IA-32\r
;\r
;------------------------------------------------------------------------------\r
\r
    .686\r
    .model  flat,C\r
    .code\r
\r
;------------------------------------------------------------------------------\r
; UINT64\r
; EFIAPI\r
; InternalMathLShiftU64 (\r
;   IN      UINT64                    Operand,\r
;   IN      UINTN                     Count\r
;   );\r
;------------------------------------------------------------------------------\r
InternalMathLShiftU64   PROC\r
    mov     cl, [esp + 12]\r
    xor     eax, eax\r
    mov     edx, [esp + 4]\r
    test    cl, 32                      ; Count >= 32?\r
    cmovz   eax, edx\r
    cmovz   edx, [esp + 8]\r
    shld    edx, eax, cl\r
    shl     eax, cl\r
    ret\r
InternalMathLShiftU64   ENDP\r
\r
    END\r